complete the sentences with for or since. 1. roger has worked as a dentist . . . twelve years. 2. sandra has studied in our class . . . october. 3. i have known alex . . . ages. 4. ella has worked in the bank only . . . two weeks. 5. julia has been to seven countries . . . she started her journey. 6. belinda has changed a lot. . . we met last time. 7. we have been to tokyo . . . five days already. 8. nick has had this car . . . a year and a half. 9. joe has been a designer . . . she graduated from university. 10)James has been my business partner . . . more than fourtten years. ​